WO1999043929A1 - Locking unit for a device for modifying the timing of charge change valves in internal combustion engines, especially for a vane-cell control device - Google Patents
Locking unit for a device for modifying the timing of charge change valves in internal combustion engines, especially for a vane-cell control device Download PDFInfo
- Publication number
- WO1999043929A1 WO1999043929A1 PCT/EP1998/007466 EP9807466W WO9943929A1 WO 1999043929 A1 WO1999043929 A1 WO 1999043929A1 EP 9807466 W EP9807466 W EP 9807466W WO 9943929 A1 WO9943929 A1 WO 9943929A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- impeller
- drive wheel
- wing
- locking
- pressure medium
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/34—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
- F01L1/344—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
- F01L1/3442—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear using hydraulic chambers with variable volume to transmit the rotating force
Definitions
- Locking device for a device for changing the control times of gas exchange valves of an internal combustion engine, in particular for a vane cell adjustment device
- the invention relates to a locking device for a device for changing the control times of gas exchange valves of an internal combustion engine, in particular for a vane adjustment device, consisting of an outer rotor designed as an external rotor, which is connected to a crankshaft of the internal combustion engine via a traction means in drive connection, which has a through a peripheral wall and has two side walls and a vane wheel inserted into this void and designed as an inner rotor, non-rotatably connected to a camshaft of the internal combustion engine and having at least one vane on the circumference of its wheel hub, arranged in an axial groove and extending radially away from the wheel hub, wherein at least one working chamber is formed in the cavity of the drive wheel by intermediate walls extending from the inside of the circumferential wall of the drive wheel and directed towards the longitudinal center axis of the device h one vane of the impeller, which extends into each working chamber, is in turn divided into two hydraulic pressure chambers, which cause a swiveling movement and /
- Such a device is generic from US-PS 48 58 572 previously known.
- six equal working chambers are formed in this device between six intermediate walls arranged opposite each other in the circumferential direction in the circumferential direction, which in turn are formed by six vanes rigidly attached to the wheel hub of an impeller connected to the camshaft, each in a first and a first second liquid-tight pressure chamber are divided.
- the mechanical coupling between the impeller and the drive wheel of the device takes place in such a way that a spring-loaded locking pin arranged in a radial bore in an intermediate wall engages in a receiving bore arranged between two vanes in the wheel hub when the vanes of the impeller come to an end position strike the intermediate walls of the drive wheel and the first pressure chambers of the device are switched off from the pressurization with the hydraulic pressure medium. If a certain value of the pressure medium pressure is then exceeded when these pressure chambers are renewed pressurized, the locking pin is pushed completely out of the receiving bore in the wheel hub against the spring force into the radial bore in the intermediate wall, so that the mechanical coupling between the impeller and the drive wheel is canceled again is.
- the invention is therefore based on the object of designing a locking device for a device for changing the control times of gas exchange valves of an internal combustion engine, in particular for a vane adjustment device, which is characterized by the smallest possible number of individual parts and thus by low manufacturing - and assembly costs and is suitable to ensure a further perfect locking of the device even after absorbing large voltages in both directions of rotation.
- this object is achieved in a device according to the preamble of claim 1 in such a way that the mechanical coupling between the impeller and the drive wheel of the device can be produced by at least one impeller of the impeller which is designed both as an impeller pivoting element and at the same time as a locking element. exceeding a pressure of the hydraulic pressure medium necessary for pivoting the impeller by means of auxiliary energy in a locking position on the drive wheel, and when a certain pressure of the hydraulic pressure medium is exceeded by the pressure medium pressure in an unlocking position pivoting position can be locked within the working chamber assigned to it.
- each wing of the impeller designed as a locking element is arranged so as to be radially movable within its axial groove in the wheel hub of the impeller and its free end face is in one or more locking position (s) of the device, each with an axial fixing groove in the Inside of the peripheral wall of the drive wheel in a form-fitting engagement.
- Each axial fixing groove is preferably incorporated over the entire width of the inside of the circumferential wall of the drive wheel and has a width which both enables the respective wing to slide in smoothly and also prevents the wing from rattling in its locking position.
- one or more blades in one end position and one or more blades in the other end position of the blades can be lockable and / or, by arranging further axial fixing grooves in the working chambers, the impeller also in one or more positions between the end positions to fix if this requires certain operating states of the internal combustion engine.
- the locking device it is also proposed that for locking the wing in its To generate the necessary auxiliary energy locking position by spring means, which are supported on the one hand on the groove base of the axial groove of the wheel hub and on the other hand on the hub end face of the wing.
- spring means which are supported on the one hand on the groove base of the axial groove of the wheel hub and on the other hand on the hub end face of the wing.
- a spring steel leaf spring has proven to be particularly advantageous for this purpose, which is inserted in the longitudinal direction into the axial groove of the wing provided as a locking element, but it is also possible to inject the auxiliary energy through both in the groove base of the axial groove and in the hub-side end face of the wing in Guide holes to produce recessed compression coil springs or other suitable spring means.
- the separate pressure medium supply line to the free end face of the wing is designed as an edge chamfering of one of the two side edges adjoining the fixing groove of the intermediate wall delimiting the pressure chamber in the drive wheel, so that when this pressure chamber is pressurized, the hydraulic pressure medium is initially along this edge chamfer and limited by the locked wing and one of the side walls of the drive wheel acts on the beveled free end face of the wing, pushes it against its auxiliary energy into its unlocking position when a certain pressure medium pressure is exceeded and only then can a volume change in the pressure chamber and thus cause a relative rotation of the impeller relative to the drive wheel .
- the separate pressure medium feed line to the free end face of the wing as a pressure medium guide groove machined on the inside in one of the two side walls of the drive wheel, which groove is located at the level of the side surface of the intermediate wall delimiting the pressure chamber, which is adjacent to the axial fixing groove and is arranged parallel to it and acts in the same way as the aforementioned chamfering.
- the locking device according to the invention for a device for changing the control times of gas exchange valves of an internal combustion engine of the vane-cell adjustment device thus has the advantage over the locking devices known from the prior art that the simultaneous use of a wing of the impeller as a pivoting and Locking element requires only a minimum of additional individual parts or work steps in order to be able to lock the impeller in relation to the drive wheel in one or more positions relative to one another.
- the locking device according to the invention stands out from the known locks advantageously by an enormously favorable material and manufacturing outlay, so that the manufacturing costs increase only insignificantly in the case of a vane cell adjusting device designed with such a locking device compared to vane cell adjusting devices without a locking device.
- the locking device according to the invention is characterized by a high level of functional reliability with regard to the absorption of high voltages in both directions of rotation of the impeller, since the entire length of the wing provided as the locking element is locked in a fixing groove, which is also incorporated over the entire width of the peripheral wall of the drive wheel, and thus has the necessary force absorption capacity for permanent, perfect locking.
- Figure 1 is a plan view of a vane adjustment device with locking device according to the invention with the housing side wall removed;
- FIG. 2 shows the side view of a vane adjustment device along the section line AA according to FIG. 1;
- FIG. 3 shows the top view of a wing of the impeller designed according to the invention as a locking element and a variant of the pressure medium supply to its free end face along the section line B-B according to FIG. 1;
- FIG. 4 shows the view X according to FIG. 3 on the inside of a side wall of the drive wheel with a further variant of the
- a device 1 designed as a vane adjustment device for changing the control times of gas exchange valves of an internal combustion engine which consists of a drive wheel 3 designed as an outer rotor, connected to a crankshaft of the internal combustion engine (not shown) via a traction means, and a drive wheel as an inner rotor , there is an impeller 9 connected in a rotationally fixed manner to a camshaft 2 of the internal combustion engine.
- the drive wheel 3 has a cavity 8 formed by a peripheral wall 4 and two side walls 6, 7, in which cavity 8 there are four intermediate walls that start from the inside 5 of the peripheral wall 4 and are directed towards the longitudinal central axis of the device 1 16 four working chambers 20 are formed.
- the impeller 9 is inserted, which on the circumference 10 of its wheel hub 1 1 has four vanes 13, each arranged in an axial groove 12 and extending radially from the wheel hub 1 1, each of which extends into a working chamber 20 in the drive wheel 3 and this again divide into two hydraulic pressure chambers 21, 22.
- a pivoting movement and / or fixing of the impeller 9 with respect to the drive wheel 3 can thus be realized, so that the camshaft 2 relative to the crankshaft of the internal combustion engine is known per se Is relatively rotated and / or clamped hydraulically.
- At least one wing 13 of the impeller 9 is designed both as an impeller pivoting element and at the same time as a locking element which, when falling below one required for pivoting the impeller 9 Pressure of the hydraulic pressure medium by an auxiliary energy in a locking position on the drive wheel 3 and, when a certain pressure of the hydraulic pressure medium is exceeded, by the pressure medium pressure in an unlocking pivot position within the direction of the pressure arranged working chamber 20 can be locked.
- FIG. 1 it can be seen that of the four vanes 13 of the impeller 9, only one vane 13 is designed as a locking element in that it is arranged radially movable within its axial groove 12 in the wheel hub 11 of the impeller 9 and with its free end face 14 with an axial fixing groove 23 in the inside 5 of the peripheral wall 4 of the drive wheel 3 is in positive engagement.
- this axial fixing groove 23 is arranged directly adjacent to the intermediate wall 16 delimiting the working chamber 20 or the pressure chamber 21, so that the wing 13 only in one of its end positions or in the specific case in the one for starting the internal combustion engine favorable starting position of the camshaft 2 on the drive wheel 3 can be locked.
- the auxiliary energy necessary for locking the wing 13 in its locking position is generated by a spring means 24 indicated in FIG. 1 and designed as a leaf spring, which is located on the one hand on the groove base of the axial groove 12 in the wheel hub 11 and on the other hand on the hub-side end face 15 of the wing 13 supports.
- the free end face 14 of the wing 13, as indicated in FIG. 1, is also slightly chamfered in the radial direction and designed as a pressure application surface of the hydraulic pressure medium, in which the widening gap between the free end face 14 of the wing 13 and the groove base of the axial fixing groove 23 a separate pressure medium supply line 25 is arranged, which is connected to the pressure medium supply line 26 to the pressure chamber 21 containing the axial fixing groove 23 of the working chamber 20.
- this separate pressure medium feed line 25 is designed as an edge chamfering of one of the two side edges 17, 18 adjoining the axial fixing groove 23 of the intermediate wall 16 delimiting the pressure chamber 21 in the drive wheel 3, which is formed by the locked wing 13 and is delimited by one of the side walls 6, 7 of the drive wheel 3 and thus results in a pressure medium supply line 25 which is triangular in cross section, through which the hydraulic pressure medium can be guided from the pressure medium supply line 26 to the free end face 14 of the wing 13.
- the separate pressure medium supply line 25 to the free end face 14 of the wing 13 can also be designed as an exemplary pressure medium guide groove machined on the inside into the side wall 6 of the drive wheel 3, which is at the level of the axial fixing groove 23 adjoining side surface 19 (FIG. 3) of the intermediate wall 16 delimiting the pressure space 21 and running parallel to it and is closed on its open side by this intermediate wall 16 itself.
- Reference numerals are exemplary pressure medium guide groove machined on the inside into the side wall 6 of the drive wheel 3, which is at the level of the axial fixing groove 23 adjoining side surface 19 (FIG. 3) of the intermediate wall 16 delimiting the pressure space 21 and running parallel to it and is closed on its open side by this intermediate wall 16 itself.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19882272.3T DE19882272B4 (en) | 1998-02-28 | 1998-11-20 | Locking device for a device for changing the timing of gas exchange valves of an internal combustion engine, in particular for a vane-cell adjusting device |
US09/601,549 US6283075B1 (en) | 1998-02-28 | 1998-11-20 | Locking unit for a device for modifying the timing of charge change valves in internal combustion engines, especially for a vane-cell control device |
JP2000533651A JP4291952B2 (en) | 1998-02-28 | 1998-11-20 | Control time changing device for gas exchange valve of internal combustion engine, especially locking device for vane type adjusting device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19808618A DE19808618A1 (en) | 1998-02-28 | 1998-02-28 | Locking device for a device for changing the control times of gas exchange valves of an internal combustion engine, in particular for a vane cell adjustment device |
DE19808618.0 | 1998-02-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999043929A1 true WO1999043929A1 (en) | 1999-09-02 |
Family
ID=7859304
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1998/007466 WO1999043929A1 (en) | 1998-02-28 | 1998-11-20 | Locking unit for a device for modifying the timing of charge change valves in internal combustion engines, especially for a vane-cell control device |
Country Status (4)
Country | Link |
---|---|
US (1) | US6283075B1 (en) |
JP (1) | JP4291952B2 (en) |
DE (2) | DE19808618A1 (en) |
WO (1) | WO1999043929A1 (en) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19936632A1 (en) * | 1999-08-04 | 2001-02-15 | Schaeffler Waelzlager Ohg | Device for varying the valve timing of an internal combustion engine, in particular camshaft adjustment device with a swivel impeller |
DE19961193B4 (en) | 1999-12-18 | 2009-06-10 | Schaeffler Kg | Rotary piston adjuster |
DE10039913C1 (en) * | 2000-08-16 | 2001-10-18 | Porsche Ag | Device to adjust relative rotation angle between camshaft and drive wheel of internal combustion engine; has inner part fixed to cam shaft and driven cellular wheel that can be locked together |
DE10104038A1 (en) * | 2001-01-31 | 2002-08-01 | Bayerische Motoren Werke Ag | Turning device for eccentric shaft of valve drive in IC engines has hydraulic vane cell pump supplied with medium by hydraulic vehicle system |
JP2002317611A (en) * | 2001-04-18 | 2002-10-31 | Aisin Seiki Co Ltd | Valve timing controlling device |
DE10135146A1 (en) | 2001-07-19 | 2003-01-30 | Porsche Ag | Device for the relative change in the angle of rotation of a camshaft |
US6543400B1 (en) * | 2001-10-19 | 2003-04-08 | Delphi Technologies, Inc. | Oil supply route in a camshaft for a cam phaser |
DE102004013234A1 (en) | 2003-03-21 | 2004-09-30 | Aft Atlas Fahrzeugtechnik Gmbh | Camshaft control for four-stroke internal combustion engine uses planetary drive permitting adjustment of phase and has sensors picking up signals from calibration marks and digitization circuit |
US6814037B1 (en) * | 2003-06-24 | 2004-11-09 | Borgwarner Inc. | Variable camshaft timing for internal combustion engine with actuator locking |
DE102004051424B4 (en) | 2004-10-22 | 2017-03-30 | Schaeffler Technologies AG & Co. KG | Device for adjusting the camshaft of an internal combustion engine and assembly tool |
DE102005013141B4 (en) * | 2005-03-22 | 2017-10-19 | Schaeffler Technologies AG & Co. KG | Device for adjusting the camshaft of an internal combustion engine |
JP4645561B2 (en) * | 2006-08-31 | 2011-03-09 | アイシン精機株式会社 | Valve timing control device |
DE102007039852A1 (en) * | 2007-08-23 | 2009-02-26 | Schaeffler Kg | Timing adjustment device |
DE102008032031A1 (en) * | 2008-07-07 | 2010-01-14 | Schaeffler Kg | Phaser |
JP5904112B2 (en) * | 2012-12-07 | 2016-04-13 | 株式会社デンソー | Valve timing adjustment device |
US10309870B2 (en) * | 2016-06-15 | 2019-06-04 | Fca Us Llc | Angular orientation of camshafts and crankshaft of an engine assembly |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4858572A (en) | 1987-09-30 | 1989-08-22 | Aisin Seiki Kabushiki Kaisha | Device for adjusting an angular phase difference between two elements |
EP0799977A1 (en) * | 1996-04-04 | 1997-10-08 | Toyota Jidosha Kabushiki Kaisha | Variable valve timing mechanism for internal combustion engine |
EP0807746A1 (en) * | 1996-05-14 | 1997-11-19 | Toyota Jidosha Kabushiki Kaisha | Variable valve timing apparatus for internal combustion engine |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5823152A (en) * | 1995-06-14 | 1998-10-20 | Nippondenso Co., Ltd. | Control apparatus for varying a rotational or angular phase between two rotational shafts, preferably applicable to a valve timing control apparatus for an internal combustion engine |
JP3077621B2 (en) * | 1996-04-09 | 2000-08-14 | トヨタ自動車株式会社 | Variable valve timing mechanism for internal combustion engine |
-
1998
- 1998-02-28 DE DE19808618A patent/DE19808618A1/en not_active Withdrawn
- 1998-11-20 WO PCT/EP1998/007466 patent/WO1999043929A1/en active Application Filing
- 1998-11-20 US US09/601,549 patent/US6283075B1/en not_active Expired - Lifetime
- 1998-11-20 JP JP2000533651A patent/JP4291952B2/en not_active Expired - Fee Related
- 1998-11-20 DE DE19882272.3T patent/DE19882272B4/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4858572A (en) | 1987-09-30 | 1989-08-22 | Aisin Seiki Kabushiki Kaisha | Device for adjusting an angular phase difference between two elements |
EP0799977A1 (en) * | 1996-04-04 | 1997-10-08 | Toyota Jidosha Kabushiki Kaisha | Variable valve timing mechanism for internal combustion engine |
EP0807746A1 (en) * | 1996-05-14 | 1997-11-19 | Toyota Jidosha Kabushiki Kaisha | Variable valve timing apparatus for internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
JP2002505397A (en) | 2002-02-19 |
JP4291952B2 (en) | 2009-07-08 |
DE19882272D2 (en) | 2001-04-12 |
US6283075B1 (en) | 2001-09-04 |
DE19808618A1 (en) | 1999-09-02 |
DE19882272B4 (en) | 2014-08-07 |
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